GPS/INS制导导弹定位仿真研究

Research on Positioning Simulation of GPS/INS Guided Missile

研究了GPS/INS制导导弹定位新方法 .与以前对GPS/INS制导载体建立单状态方程不同 ,对导弹运动过程建立两种模型 ,机动和非机动模型 ,分别对应低动态和高动态应用环境 .利用伪距和伪距率测量信息进行卡尔曼滤波 .特别针对GPS制导的近程导弹运动过程的特点提出修正交互多模算法 ,能提高模型转换期间定位精度 .仿真结果证明用这种方法定位可以达到实时和高精度 ,提高运动状态改变时的定位精度 .这种方法对提高载体的精确制导有一定现实意义 .

Application of the modified IMM algorithm in the GPS/INS guided missile is studied.And it presents two models,maneuver or non-maneuver,which are aimed at low dynamic or high dynamic conditions respectively.Psudorange and psudorange rate are used to update Kalman filter.The modified IMM algorithm is simulated,which is corresponded to the short range missile.The simulation result shows that the algorithm provides real-time and more accurate positioning result.And the way is helpful to increase the missile positioning precision to some extent.